t1: 4
t2: 4
t3: 4
t4: 4
t5: 4
t6: 4
t7: 4
t8: 4
t9: 4
t10: 4
t11: 4
t12: 4
t13: 4
t14: 4
t15: 4
t16: 4
t17: 4
t18: 4
t19: 4
t20: 4
t21: 4
t22: 4
t23: 4
t24: 4
t25: 4
t26: 4